Transmission-gear.



No. 870,107. v PATENTED NOV. 5, 1907. E. KOEN. TRANSMISSION GEAR.

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TRANSMISSION GEAR. f

APPLIOAUION FILED SEPT. 10, 1908.

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PATBNTED NOV. 5,190'7.

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PATENTED NOV. 5, 1907.

E. KOEB. TRANSMISSION GEAR.

APPLIUATION FILED SEPT. 1o, 190e.

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E. KOEB. TRANSMISSION GEAR.

APPLIUATION FILED snr'r. 1o. 100e.

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lNo. 870,107.

B. KOEB. TRANSMISSON GEAR. Arrmornon Hmm s221210, 190e.

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UNITED STATES PATENT OFFICE.

EMIL KQEB, OF LEIPSIC, OHIO, ASSIGNOR OF ONE-HALF TO RALPH P. THOMPSON, OF SPRING- FIELD, OHIO.

TRANSMISSION-GEAR.

- Specification of Letters Patent. Application led September 10. 1906.` Serial No. 333.879.

Patented Nov. 5, 19.07.

- To all 'whom 'itmay concern:

United Statesfresiding at Leipsic, in the county of VPutnam and State of Ohio, have invented certain new and useful Improvements in Transmission-Gears, of whichf the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to transmission gears, and more particularly 'to that type of transmission gear which is used in automobiles.

The object of the invention is to provide a transmission gear of this type which will be compact in its arrangement, so that it will occupy but little room on the vehicle, and which will be strong and durable in construction and simple in its operation.

With these objects in view my invention consists of the construction hereinafter described and more particularly pointed out in the claims.

Referring to the accompanying drawings, Figure l is a section taken horizontally through the center of the transmission and compensating gears, showing the same in their idle position, Fig. 2 is a similar view, showing the position of the gears when on high speed; Fig. 3 is a horizontal section taken centrally through the transmission gear, showing the positioii of the same when on low speed; Fig. 4 is a view similar to Fig. 3, showing the gears in reversing position; and Fig. 5 is an end view of the same, showing the relative location of the several gears.

In carrying out my invention in its preferred construction, as shown in the accompanying drawings, I employ a hollow drive shaft l, having its outer end reduced to form a journal 2 and mounted in a suitable bearing on the frame of the machine, the reduced portion 2 being of greater length than the bearing, to allow the shaft to move longitudinally therein. The opposite end of the shaft has an enlarged portion 3, slidably mounted in a bearing or collar 4, which in turn is carried in a suitable support on the frame of the machine. The inner end of the shaft l is provided with a flange 5, extending at right angles thereto and having firmly secured thereto radial arms 6, which are provided at their outer ends with a ring 7, forming one member of a clutch, which will be hereinafter described. The opening in the enlarged portion of the hollow shaft l is enlarged to form a bearing 8, which is adapted to receive the shaft or trunnion 9 of the balance-wheel l0, which is operated from the engine through suitable cranks connecting with the wrist-pin ll. The supporting member or web l2 of this balance- 'wheel is formed at one side of the center of the same, thereby causing the periphery of the balance-wheel to extend inwardly and form an overhanging ange 13 extending'a considerable distance beyond the outer end of the bearing 8. Formed in the inner face of this overhanging portion is a substantially V-shaped groove 14, provided with suitable friction surfaces l5 adapted to receive the ring 7 carried by the arms 6, thereby completing the clutch for uniting the two members of the drive shaft. Secured to the inner end of the shaft 9 is a rod 16, which may be formed integral with said shaft, but is preferably. formed separate therefrom and has its inner ends screw-threaded to engage with the screw-threaded recess in the end of said shaft. This rod extends throughout the length of the hollow shaft, and is surrounded at its outer end by a coiled spring 17 which bears at its inner end against a iange 18 extending into the hollow shaft and at its opposite end against a nut 19 screw-threaded on the end of the shaft 16 and capable of adjustment on the same to regulate the tension of the spring 1.7. A jam nut 20 is provided to lock the adjusting nut l9 in its adjusted position. The drive shaft l is also provided at its outer end with a collar 2l adapted to connect with a suitable operating mechanism for sliding the shaft longitudinally in its bearings. l l

Suitably mounted in the frame and parallel with the shaft l is a counter-shaft or driven shaft 22, provided with a compensating gear 23, of'any suitable type, that shown in the drawings being of the well-known planetary type, having the large and small gear-wheels 24 and 25 on the exterior of the casing 26 and the several pinions 27 carried on the studs 28 within the casing and engaging the pinions 29 on the inner4 ends of the two sections of the driven shaft 22. The drive shaft l is provided immediately adjacent the inner end of the enlarged portion 3 with a stepped up or raised portion 30, of less height than the enlarged portion and forming a shoulder at the end of the same, said shoulder being shown at 3l. Rigidly secured to this raised portion 30 is a collar 32, having an enlarged or outwardly extending portion 33 overhanging the reduced portion of the Shaft l and forming a recess 34 between said overhanging portion of the collar and the shaft. The outer face of this collar and ange forms a bearing surface upon which is rotatably mounted a gear-wheel 35, comprising a sleeve 36 engaging the bearing surface on the collar 32. This sleeve has an outwardly extending web or supporting member 37, which is provided at its outer end with a flange 38 extending parallel with the flange 36 ofthe sleeve portion. The flange 38 is provided on its outer face with gear teeth 39 and on its inner face with gear. teeth 40. On the opposite side of the web 37 is an annular flange 4l having an inwardly extending portion 42, loosely mounted in the recess 43 of the bushing 4, thereby allowing the gear 35 to rotate independently of the shaft 1, but preventing the same from mowing longitudinally with said shaft. The outer gear teeth 39 of the geur-wheel 35 are permanently in mesh with the smaller or high speed gear 24 of the compensating gear 23. Mounted on the shaft 1, so as to rotate therewith, but having a free sliding movement longitudinally thereof. is a drive pinion 44, comprising a sleeve l45, suitably keyed to the shaft 1, and provided'near-its center with an outwardly extending flange 46, pro-l vided-with an overhanging portion 47 having gear teeth the recess 34 and the teeth 48 are in mesh with the inner i'eerh 40 of the gear-wheel 35, and ille ing portion 33 and the sleeve 36 of the gear-wheel are within the recess 49 of thedrive pinion 44, thereby forming a, substantial one-piece gearing rotating and driving the gear 24.

To put the machine on low speed, the drive pinion is slid along the shaft 1 until the teeth 48 mesh with the teeth of the large or low speed pinion 25 of the compensating gear, thereby driving this gear directly from the shaft. The drive gear being out oi engagement with the gear 35, allows that gear to remain stationary or io move at thes ame speed with the small gear 24 of the compensating gear with which itis .in mesh, regardless of the speed of the shaft 1. sired to bring the driven mechanism to a stop while the engine is running, intermediate position, shown in Fig. 1, where it is out of mesh with both gears of the compensator.

Mounted in the frame of the machine, at a lower` level than the shafts 1 and 22, and at a point intermediate of these shafts, is a suitable counter-shaft 51`carrying a reversing gear 52, eomprisinga large and asnlall gear 53 and 54 slidably mounted on the shaft 51. In order overhangwhere it meshes with the large gear 53 of the reversing gear, thereby driving the gear then shifted, through its operating mechanism, to bring that pinion into mesh with the low speed gear of the compensator and, as the machine gains headway, is shifted to bring thereby operating to bring the gear 54 `into engagement with the compen- Bator gear 25 and the, pinion 44 is then shifted to its When it is de the pinion 44 is brought to andirection. f l

the compensator gear 25l in the reverse wish it to be understoodfthat Ifdo not desire to be limited to the exact details ofieonstruction shownand described, for"obvious-modifications will loecurtol a person .skilledfin the arts j 4 Having 4thusr'ully,described myinvention, whatI claim as newfandzdesirefto secureby;Letterslatent 1. In a'devic'erof the lcharacter.described,A the` Icombinaltion,.with adriven shaft and' hlghand low speedsgears carrled thereby, of a driving shaft extending parallel to said snid high speed geur, a pinion, slidahly mounted on said driving shaft and rotating therewith und adapted toengnge either the inner teeth of said rotatable gear or to engage said low speed v ion` substantially us described.

2. Inln device of the chnrncter described, the combinawith u longitudinally movable drivlngshafi: and a scribed.

3. In a device of the tion, with n collar and having inner and outer teeth said outer teeth meshing with the gear on saiddriven shaft, n driving pinion said driving-shafh'nnd comprising a sleeve portion adapted to enter said recess, and an overhanging portion protion, with a driving-shaft, a' driven shaft and high and low gear, and means for shifting said plnvlo .120 mounted to slide longitudinally ot l teeth on said gear for driving said high speed gearing and adapted to engage directly with the teeth of said low speed gearing on said driven shaft, substantially as described,

7. ln a device of the character described, the combination, with a driving-shaft, a driven shaft, and high and low speed gears carried by said driven shaft, of a gear rotatably mounted on said driving-shaft and meshing with the high speed gear on said driven shaft, a' driving pinion slidably mounted on said driving-shaft and adapted to engage said rotatable gear, a pair of reversing gears, slidably mounted beneath said driving gear and having the horizontal plane of their axes of rotation at a point intermediate of the horizontal planes of the axes of rotation of said drivingshaft and said driven shaft, one of said gears being adapted to mesh with the low speed gearing on said driven shaft and the second of said reversing gears being adapted to be engaged by said driving pinion, substantially as de-v scribed.

S. in a device of the character described, the combination. with a driving-shaft, ay driven shaft, lhigh and low speed gearing carried by said driven shaft, a gear rotatably mounted on said driving shaft and having inner and outer teeth, said outer teeth meshing with said high speed gearing, and a pinion slidably mounted on said driving shaft and rotating therewithand adapted to engage either the internal teeth on said rotatable gear or said low speed gearing. of a reversing gear comprising a large and a small pinion slidably mounted near said driving and driven shafts and rotating inunison, said small gear being adapted to engagethe low speed gearing on said driven shaft, and said large gear being adapted to be engaged by the driving means on said driving-shaft, substantially as described.

9. ln a device of the character described, the combinaa tion, with a driving means and a clutch member carried thereby. of a hollow driving-shaft capable of a longitudinal sliding movement and a`iclutch member carried at one end of said shaft, means for shifting said shaft to move said clutch member into and out of engagement with the first mentioned clutch member, means contained within`said hollow shaft for holding said clutch members normally in engagement, a driving gear carried by said shaft, a driven gear mounted near the same and an intermediate gear adapted to transmit motion from said driving-shaft to the driven gear, substantially as described.

10. in a device of the character described, the combination, with a balance-wheel, means for driving the same, a trunnion therefor. and a clutch member carried by said balance-wheel, of a driving-shaft capable of a longitudinal sliding movement in its bearings, a clutch member carried at one end of said shaft, a bearing formed in the end of said shaft and adapted to receive said trunnion, means for shitting said shaft to bring said clutchmembers into engagement, means carried by said Fshaft and connected to said trunnion for holding said clutch members normally in engagement, a driving'gear mounted on said drivingshaft. a driven gear mounted near the same and intermediate gearing for transmitting motion fromsaid drivingshaft to said driven gear, substantially as described.

ll. In a device of the character described, the combination, with a balance-wheel and means for driving the same, a trunnion therefor, and a clutch member carried thereby, of arliollow driving-shaft capable of longitudinal movement, a driving gear carried thereby, a clutch member at one end of said shaft, a bearing formed in one end of said shaft and adapted to receive said trunnion, means for' shifting said shaft to bring said clutch members into engagement, an extension carried by said trunnion adapted scribed.

lon said shaft and to enter said hollow shaft, and a spring interposed between said extension and said shaft for holding said clutch members normally in engagement, "substantially as described.

12. In a device of the character described, the combination, with a balance-wheebhaving an annular recess in one face thereof means for driving said balance-wheel and a trunnion therefor, of hollow driving-shaft capable of longitudinal movement, radial arms secured to one end` of said shaft, a ring carried by said arms and adapted to engage the recess in said balance-wheeba bearing formed in one end of said shaft adjacent to said clutch member and adapted to receive said trunnion, a rod secured to said trunnion and extending through said hollow shaft, a coiled spring surrounding one end of said rod within said shaft, a projection Within said shaft engaging one end of said spring, a stop nearthe'outer end of said rod'engaging the opposite 'end of said spring, means for shifting said shaft longitudinally of its bearings, a driven shaft, and means for driving the samefrom said driving shaft substantially as described.

13. In a device of the character described, the combination, with a balance-wheel, means for driving the same, a trunnion therefor, and a clutch member carried thereby, of a driving-shaft capable of longitudinal movement, a clutch membercarried by one end of said shaft, a bearing formed in said shaft and adapted to receive' said trunnion, means for holding said clutch members firmly in engagement, means for shifting said shaft longitudinally of its bearings, a driven shaft, high and low speed gears carried by said driven shaft, a gear rotatably mounted on said driving-shaft and engaging the high speed gear 0n said driven shaft, a pinion rotating with said driving-shaft and sliding thereon and adapted to engage either said rotatable gear or said low speed gear. and mean/s for 'shifting said pinion, substantially as described.

14. In a device of the character described, the combination, Fwith a driven-shaft and high and low speed gears carriedwthereby,'a driving shaft capable of a sliding move- Vment in a longitudinal direction, a gear rotatably mounted on said driving shaft adapted to engage the high speed gear on said driven shaft, a pinion slidably mounted on said driving shaft and adapted to engage either said rotatable gear or said low speed gear of a clutch mechanism comprising a driving member havinga recess in one face thereof, said recess having outwardly diverging'walls, a member carried by said driving shaft and adapted to engage said recess, and means for shifting said 'shaft to bring said members into engagement, substantially as de- 15. In a`device vof the'4 character described, the combination,` with a driven shaft and high and low speed gears carried thereby, a driving shaft capable of a sliding movement in a longitudinal direction, a gear rotatably mounted on said driving shaft adapted to engage the high speed gear on said driven shaft, and a pinion slidably mounted adapted to engage either said rotatable gear or said loiv speed gear oficlutch mechanism comprising a driving member having an annular V-shaped recess in one face thereof, a member carried bysaid driving shaft and adapted to engage said recss, and means for 4shifting said shaftto bring said members into engagement,

substantially as described.

.In testimony whereofVfI aiiix` my signature in presence.

of two witnesses. I

` l EMIL KOEB. Witnesses:

^ H. C. EDWARDS,

I. E. YABNELL. 

